<template>
  <div class="swiper-container">
    <div class="swiper-wrapper">
      <div
        class="swiper-slide"
        v-for="(skuImageList,index) in skuImageList"
        :key="index"
      >
        <img :src="skuImageList.imgUrl" :class="{active:index == activeImg}" @click="changeActive(index)"/>
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>
  import Swiper from 'swiper'
  export default {
    name: "ImageList",
    data(){
      return{
        activeImg:0
      }
    },
    props:['skuImageList'],
    watch:{
      skuImageList(){
        this.$nextTick(()=>{
          new Swiper ('.swiper-container', {
    
            // 如果需要前进后退按钮
            navigation: {
              nextEl: '.swiper-button-next',
              prevEl: '.swiper-button-prev',
            },
            //一次显示几张图片
            slidesPerView : 3,
            //每一次切换图片的个数
            slidesPerGroup : 1,
          })     
        })
      }
    },
    methods:{
      changeActive(index){
        this.activeImg = index
        this.$bus.$emit('getIndex',this.activeImg)
      }
    }
  }
</script>

<style lang="less" scoped>
.swiper-container {
  height: 56px;
  width: 412px;
  box-sizing: border-box;
  padding: 0 12px;

  .swiper-slide {
    width: 56px;
    height: 56px;

    img {
      width: 100%;
      height: 100%;
      border: 1px solid #ccc;
      padding: 2px;
      width: 50px;
      height: 50px;
      display: block;

      &.active {
        border: 2px solid #f60;
        padding: 1px;
      }
    }
  }

  .swiper-button-next {
    left: auto;
    right: 0;
  }

  .swiper-button-prev {
    left: 0;
    right: auto;
  }

  .swiper-button-next,
  .swiper-button-prev {
    box-sizing: border-box;
    width: 12px;
    height: 56px;
    background: rgb(235, 235, 235);
    border: 1px solid rgb(204, 204, 204);
    top: 0;
    margin-top: 0;
    &::after {
      font-size: 12px;
    }
  }
}
</style>